Quote Originally Posted by m_c View Post
What width are the slots?

Chip clearance is key, be that flood or air/mist.

I'd be looking at trochoidal toolpaths and making more use of the length of the cutter.
Drilling is the most efficient method of material removal, but if you're recutting air in the drilled holes, there's no point in drilling holes.
Trochoidal is a good shout, same sort of logic as my cutting the slot at 1.5x cutter width to help with chip clearance.